EP 0447711 B1 19970205 - Process for manufacturing an optical disk master
Title (en)
Process for manufacturing an optical disk master
Title (de)
Verfahren zur Herstellung einer Matrize für optische Platten
Title (fr)
Procédé de fabrication d'une matrice de disque optique
Publication
Application
Priority
US 48203390 A 19900220
Abstract (en)
[origin: EP0447711A2] The invention discloses a simplified four step process for making an optical disc master or alternatively a WORM disc by first making or obtaining a transparent polymer disc with a tracking groove of desired geometry molded therein, then spin coating an optically active lamina on the grooved side of the disc, then recording data on said polymer disc with groove controlled and tracked laser means by ablating active lamina, forming pits, the shape of which is determined by the groove geometry and finally depositing a conductive and reflective lamina over the pitted active lamina. To change the OD master to an OD WORM, a protective cover is added to the electrically conductive and optically reflective lamina. <IMAGE>
IPC 1-7
IPC 8 full level
G11B 7/26 (2006.01)
CPC (source: EP US)
G11B 7/26 (2013.01 - EP US)
Designated contracting state (EPC)
BE DE FR GB IT NL SE
DOCDB simple family (publication)
EP 0447711 A2 19910925; EP 0447711 A3 19920325; EP 0447711 B1 19970205; DE 69029906 D1 19970320; DE 69029906 T2 19970904; US 5099469 A 19920324; US RE34506 E 19940111
DOCDB simple family (application)
EP 90311298 A 19901016; DE 69029906 T 19901016; US 48203390 A 19900220; US 96515592 A 19921022